Abstract:

The contracted project with a periodicity forbidden time window (special contracted project for short) is the key to affect the implementation effect of the program. How to effectively control the progress of the contracted project with periodicity forbidden time window is not only a theoretical problem, but also a practical problem. First, the problem is defined, the principle of employer cost optimization of program is analyzed in detail, and the special contracted projects are divided into two categories: contracted projects that can be completed within the original time window and contracted projects that can be completed in the next time window. Then, considering the particularity of the contract project with a periodic prohibition time window, an optimization model of the program owner’s cost before and during the implementation of the program are constructed. Afterwards, a case study was conducted in combination with program R to verify the feasibility and effectiveness of the model. Finally, the management enlightenment is proposed. The research results show that in the program with a periodic forbidden time window, the degree of adverse impact of contracted project delay on the program depends not only on the degree of adverse impact on general contracted projects, but also on whether special contracted projects can be completed within the original planned time window. To this end, the employer should improve the probability of completing the special contracted project within the original time window by arranging the start time of the program and the special contract, so as to significantly reduce the cost of the program employer.

Key words: program, non-commercial resources provided by employer, forbidden time window, model, periodicity

摘要：

具有周期性禁止时间窗口的合同项目（简称特殊合同项目）是影响项目群实施效果的关键因素之一，如何有效地控制具有周期性禁止时间窗口合同项目的进度既是一个理论问题，也是一个实践问题。首先界定了问题，分析了项目群业主费用优化原理，并将特殊合同项目分为在原时间窗口能够完成的合同项目和在下一个时间窗口能够完成的合同项目两类；其次，考虑具有周期性禁止时间窗口的合同项目的特殊性，构建了项目群实施前和项目群实施过程中的项目群业主费用优化模型；再次，结合项目群R开展案例分析,验证模型的可行性和有效性；最后，提出了管理启示。研究结果表明：在具有周期性禁止时间窗口的项目群中，合同项目延误给项目群带来的不利影响程度除了取决于给一般合同项目带来的不良影响程度，更多取决于特殊合同项目能否在原计划时间窗口内完成。为此，业主应通过安排项目群和特殊合同项目的开始时间，提高特殊合同项目在原时间窗口内完成的概率，以有效减少项目群业主费用。

关键词:

项目群, 甲供非商品化资源, 禁止时间窗口, 模型, 周期性